mapping_set_error: add unlikely()

This is called on a per-page basis and in the vast majority of cases
`error' is zero.

Cc: Guillaume Chazarain <guichaz@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h
index d2fca80..ee1ec2c 100644 (file)
--- a/include/linux/pagemap.h
+++ b/include/linux/pagemap.h
@@ -22,7 +22,7 @@
 
 static inline void mapping_set_error(struct address_space *mapping, int error)
 {
-       if (error) {
+       if (unlikely(error)) {
                if (error == -ENOSPC)
                        set_bit(AS_ENOSPC, &mapping->flags);
                else